第9题: [单项选择]An effective way to prevent the burnout of young athletes is ______ . A. to make sports less competitive B. to make sports more challenging C. to reduce their mental stress D. to increase their sense Of success 参考答案:C 答案解析:[解析] 推理判断题。根据关键词burnout可知答题依据在首段最后两句。文章说 Stress can be physical,emotional,or psychological,and resea